As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING IN FLIGHT FUNCTIONAL CHECK-CREW NOTED SMOKE IN COCKPIT AND CABIN DURING CLIMB OUT FROM HEF. CREW TURNED OFF BLEED AND ENVIRON MODE TO OFF. APPROACH AND LANDING WAS UNEVENTFUL. MX PERFORMED COMP WASH, INSPECTED OIL FILTER, RAN ENGINE TO CHECK FOR ANY LEAKS. DURING RUN CHECKED BLEEDS AND HEAT FOR EXCESS OF 10 MIN. COULD NOT DUPLICATE. AIRCRAFT RELEASED.